Tape with corded edges



Jan. 17, 1939. J. R. sux ET AL TAPE WITH CORDED EDGES Filed Oct. 8, 1936 SI m m E m M V f 0 WR w $5 BY J,

W I TNESSES a. M $5M is shrinking, and the limberness of the fabric tends. In Fig. IV a number of separate yarns l are 50 of a fastener comprising two cord edged tapes the surrounding yarns to a pliable but substan- 5o Patented it... 17, 1939 g 2,144,591

UNITED STATES! PATENT DFFICE auas'ei JuliusB. Bux, Melrose Park, and'Albcrt L. Francis, Philadelphia, Pa... assignors to J. Sullivan A; Sons Mfg. (70., Philadelphia,- Pa., a corporation of Pennsylvania Application October 8,1936, Serial No. 104,608

v3 Claims. (C1- 28-1) This invention relates to tapes with corded II-II of Fig. I showing diilerent methods of con edges and particularly to a tape which is sub struction. stantially free from stretching and shrinking ef- Figs. VI and VII are cross-sectional views of fects along the corded edge. tapes with sewed-on cords.

5 One of the dimcult problems in the construction With reference to Fig. I, the tapes 'I have corded 5 of cord edged tapes and particularly zipper tapes edges 2 to which are attached scoups 3. A fastenhas been the prevention of stretching and shrink-1 ing element is shown at 4. The corded edges 2 ing and at the same time to produce a rigid and are made up as shown in Figs. lI-VH in which a reasonably pliable material. Bhis tendency tothe cord itself is shown at 5 and the cellulose delo ward stretching or shrinking and limberness of I 'rivative yarns at t. I

fabric is a serious difficulty, especialy in zipper In Fig. II the cellulose derivative'yarns 6 are tapes, because the metal scoups or other attachwoven with the cord 5.

j ments fastened to the corded edgeof the tape are In Fig. 111 the cellulose derivative yarns are thrown out of alignment by unequal stretching ,or incorporated into the cord ii.

satisfactory results. As a result the twoi'oppo- 5. Cellulose derivative yarns 6 are distributed site sides of a zipper fastener, for instance, will among the series of yarns 7.

not fit perfectly, causing a tearing out of the In Fig. Vthe ellu e d rivativ yar B ar scoups or a jamming of the fastening element. J woven into the fabricj that covers the cord 5. i0

Heretofore it has been the practice to wet the Fig. VI shows a tape with a sewed on cord 5 and finished fastener and then stretch it but this cellulose derivative threads I incorporated in the method represents only a temporary solution of cord the problembecause the tapes soon undergo un- Fig. VII shows a tape with a sewed-on cord 5 equal shrinking particularly when washed. It has and cellulose derivative threads 6 woven'into the 38 also been the practice to use substances such as fabric 5. v 4 V st'archand the like in an attempt to solve these In carrying out the present invention a celludifiicultiea'but these methods also represent onlylose derivative yarn is first incorporated into the temporary remedies since the starch soon washes tape in some manner similar to those shown in so out. .Substances such as glue are unsuitable bethe drawing. A cellulose ester yarn, such as celcause the finished tape must be pliable as well as lulose acetate, has been found especially suitable, free from stretching'or shrinking effects. but other cellulose derivative yarns may be used. Therefore the principal object of the present in- The cellulose derivative yarns are then subjected vention is to provide a cord edged tape which is to the action of a suitable solvent. In the case of substantially free from stretching 'or shrinking cellulose acetate yarns, we have discovered that 35 eflects particularly in the vicinity of the corded a solution composed of Sparts acetone and 1 part edge. a j methyl'alcohol makes a very satisfactory solvent. We have discovered that these difflculties may Other solvents such as acetone alone, or ethyl aceg-be obviated by incorporating'a number of yarns tone, may be used, however. Where yarns other 40 composed of a cellulose derivative, such as Celathan cellulose acetate are used various other suit- 0 nese, which is a cellulose acetate rayon, subjecting able'solvents may used. The solvent is applied by, the incorporated cellulose derivative to" the aceither passing the tape through the solvent solution of a suitable solvent, and fusing the distion or applying the solvent solution'to the tape by solved cellulose yarn by the application of heat. wicks, rollers or sprayers. In any event, the This results in the production of a stiffening mesolvent treatment is continued for a time sum 45 dium which renders the cord and fabric substaneient to render the cellulose derivative yarn cetially free from stretching or shrinking effects in mentltious. The tape is then placedv under tenthe vicinity of its formation.

'to buckle the strips of fasteners and produces unshown which are substituted for the twisted cord v p g .sion and subjected to'a temperature sufiicient to In the drawing, Fig. I shows a perspective view fuse the dissolved cellulose derivative yarn and with scoups attached. tially non-stretching, non-shrinking mass. This Fig. 11 is a cross section through II-II of Fig. I, action. which we have herein referred to as "fushowing one method of constructing a tape acsion, produces a tape of the desired qualities by cording to this invention. 7 V virtueof the fact that the dissolved and heated Figs. III, IV, and V are cross-sections through cellulose yarns permeate the. surrounding yarns r claimed.

and then set in such a way as to cement the yarns into a pliable but non-stretching as well as nonmass.

A tape constructed according to' the present invention exhibits many advantages over any tap'e\ hitherto available and particularly in the field oi zipper tapes. The combination oi pliability plus substantial freedom from stretching and shrinking eilects prevents the usual troubles arising from mis-allgn'ment of the scoups and adds-substantially to the life of the fastener. Moreover it is possible to constructa tape with a perfectly straight edge which will remain straight indefinitely. I

It will be understood that the foregoing description refers-to but one preferred embodiment of the present invention and that other cellulose yarns and other solvents may be used coming within the scope oi the invention as hereinafter Having thus described our invention. we claim: 1. A process oi producing a tape with an edge that is substantially free from stretching and shrinking eilects, which process comprises incorporating cellulose derivative yarn in the tape fabric, amongst the other yarns composing it, treating the cellulose derivative yarn in the tape fabric with a suitable solvent and thereby rendering the same cementitious; and heating the tape while under tension and thereby fusing the cementltious cellulose derivative material and permeating the surrounding yarns oi the fabric therewith, so that tive material cements the other yarns into a pliable but non-stretching and non-shrinking condition.

2. Aprocessassetiorthinclaim Lwhereinthe cellulose derivative yarn employed is a cellulose ester yarn.

3. Aprocessasset iorthinclaim 1,.wherein the cellulose derivative yarn employed is a cellulose ester yarn, and the JULIUS R. BUX. ALBERT L. FRANCIS.

when set the cellulose derivasolvent wherewith it is treated v comprises acetone and methyl alcohol. 

